Hello,
First of all please excuse my bad english as it is not my native language.
Two days ago when i was working on my laptop i felt that the left side of the keyboard is very hot and after 1-2 minutes i felt a smell of burnt plastic, i turned off the laptop, then i opened it inside and i found out that the power jack that connects to the motherboard was melting, i ordered the cord and replaced it, i was trying to find out the cause for that overheating and i just learned that the mosfet PQ301 is causing the overheating. Just to mention my laptop works perfect on battery without overheating. If i connect the charger PQ301 starts heating very fast, if i disconnect the battery and connect the charger PQ301 is cold, if i turn on the laptop with the battery disconnected PQ301 starts heating very fast and the laptop powers up, but if i dont turn it off it will melt the power jack again and maybe will damage the motherboard too.
I suspect that something is in short after the PQ301 or PQ301 is faulty, can you please let me know what i should check? I own a multimeter so i can check some of the electronic pieces. Thank you.
First of all please excuse my bad english as it is not my native language.
Two days ago when i was working on my laptop i felt that the left side of the keyboard is very hot and after 1-2 minutes i felt a smell of burnt plastic, i turned off the laptop, then i opened it inside and i found out that the power jack that connects to the motherboard was melting, i ordered the cord and replaced it, i was trying to find out the cause for that overheating and i just learned that the mosfet PQ301 is causing the overheating. Just to mention my laptop works perfect on battery without overheating. If i connect the charger PQ301 starts heating very fast, if i disconnect the battery and connect the charger PQ301 is cold, if i turn on the laptop with the battery disconnected PQ301 starts heating very fast and the laptop powers up, but if i dont turn it off it will melt the power jack again and maybe will damage the motherboard too.
I suspect that something is in short after the PQ301 or PQ301 is faulty, can you please let me know what i should check? I own a multimeter so i can check some of the electronic pieces. Thank you.
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